Automatically generated diagram
The DOT config file
graph physical_net_topology { legend [ label="{ legend | {red | public} |{blue| v1002 inside} | {green | v105 dmz} }", shape=record]; subgraph cluster_sp { label="pub switch"; graph [ fillcolor="burlywood", style="filled"] node [shape=record,fillcolor="white", style="filled"] edge[style=invis]; node [label="3"] p3 ; node [label="2"] p2 ; node [label="1"] p1 ; { rank=same; p1; p2; p3} p1 -- p2 -- p3; } subgraph cluster_si { label="Internal switch"; edge[style=invis]; node [shape=record ]; node [label="1"] e1 ; node [label="2"] e2 ; node [label="3"] e3 ; node [label="4"] e4 ; node [label="5"] e5 ; node [label="6"] e6 ; { rank=same; e1; e2; e3; e4; e5; e6;} e1 -- e2 -- e3 -- e4 -- e5 -- e6; } subgraph cluster_fw1 { label="FW1 ports"; graph = [ style = rounded] edge[style=invis] node [shape=record ]; node [label="1"] f1 ; node [label="2"] f2 ; node [label="3"] f3 ; node [label="4"] f4 ; { rank=same; f1; f2; f3; f4; } f1 -- f2 -- f3 -- f4' } p2 -- f1 [color="red"] f2 -- e1 [color="blue"] f3 -- e2 [color="green"] e3 -- server1 [color="green"] e4 -- server2 [color="green"] e6 -- server3 [color="blue"] }
Results discussion
It took me a good couple of hours to write this config. Even after that I still have only a very basic understanding of how flexible the dot language is. The coding was very laborious. It required a lot of trying and testing if the new generated graph is what you are looking for.
Often the options I was trying didn't have any effect.
The documentation I found and read wasn't explaining all the details so trying and intuition was often your only friend.
References
http://sandbox.kidstrythisathome.com/erdos/
http://graphviz-dev.appspot.com/
http://www.graphviz.org/
http://rtomaszewski.blogspot.co.uk/search/label/diagram
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